Safety helmet



FIG. 1 is a front view of a safety helmet;

FIG. 2 is a rear view of the safety helmet;

FIG. 3 is a left side view of the safety helmet;

FIG. 4 right side view of the safety helmet;

FIG. 5 is a top view of the safety helmet;

FIG. 6 is a bottom view of the safety helmet;

FIG. 7 is a front right perspective view of the safety helmet;

FIG. 8 is a right rear perspective view of the safety helmet; and,

FIG. 9 is a front left perspective view of the safety helmet.

The broken lines shown on the drawings are for the purpose of illustrating the environmental structure and form no part of the claimed design.

The cross-hatch shading, and stipple shading as used in this application are drafting conventions used to show contrast with adjacent surfaces. 

CLAIM I claim the ornamental design for a safety helmet, as shown and described. 